CN113567118B - Wet clutch sliding friction transmission performance detection method - Google Patents
Wet clutch sliding friction transmission performance detection method Download PDFInfo
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- CN113567118B CN113567118B CN202110667130.0A CN202110667130A CN113567118B CN 113567118 B CN113567118 B CN 113567118B CN 202110667130 A CN202110667130 A CN 202110667130A CN 113567118 B CN113567118 B CN 113567118B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/022—Power-transmitting couplings or clutches
Abstract
The invention belongs to the technical field of clutches, and discloses a method for detecting the sliding friction transmission performance of a wet clutch, which executes the following detection steps based on a detection rack; the detecting step comprises: assembling a clutch to be tested on a detection rack, and setting operation parameters according to the working condition control parameters; obtaining the difference value between the rotating speed of the first motor and the rotating speed of the input shaft of the gearbox to obtain the sliding friction rotating speed difference N dif (ii) a Based on the slip speed difference N dif Obtaining a rotation excitation frequency f; resampling the torque signal of the clutch according to the rotation excitation frequency to obtain a torque signal sequence T: { T: } 0 ，T 2 ，T 3 ，…，T n Drawing a frequency-torque relation graph according to the relation of the sliding friction rotating speed difference-frequency-torque; determining the maximum value in a torque signal sequence T based on the frequency-torque relation graph TO obtain a 1-order TO value; and evaluating the quality of the clutch TO be detected based on the TO value of 1 order. The method for detecting the sliding friction transmission performance of the wet clutch can reliably realize the quality detection of the clutch.
Description
Technical Field
The invention relates to the technical field of clutches, in particular to a method for detecting the sliding friction transmission performance of a wet clutch.
Background
The clutch assembly part is easy to have unstable rotation speed and torque rotation in the clutch friction transmission due to assembly reasons in production and manufacturing, the torque and the rotation speed are jittered, the driving performance of the whole vehicle is influenced, and the creep working condition is obvious. In the prior art, the quality inspection of the clutch assembly is usually realized by manually combining various instruments and meters, and the detection efficiency and the reliability are poor.
Disclosure of Invention
The invention provides a method for detecting the sliding friction transmission performance of a wet clutch, which solves the technical problems of the prior art that the quality inspection efficiency of a clutch assembly is high and the reliability is poor.
In order to solve the technical problem, the invention provides a method for detecting the sliding friction transmission performance of a wet clutch, which executes the following detection steps based on a detection rack;
the detection bench includes: the device comprises a gearbox, a first motor, a second motor, a third motor and a torque sensor;
the gearbox is provided with a clutch connecting mechanism which is used for being matched and connected with a clutch to be detected;
the gearbox is provided with a gearbox control unit and is used for monitoring the torque of the clutch to be detected and the rotating speed of an input shaft of the gearbox;
the first motor is connected with an input shaft of the gearbox and used for controlling input torque and rotation speed;
the torque sensor is connected with the first motor and used for measuring the input torque of the first motor;
the second motor and the third motor are respectively connected with a first output shaft and a second output shaft of the gearbox and used for controlling the output rotating speed;
the working condition control parameters of the wet clutch sliding friction transmission performance detection method are set by referring to the working condition parameters output by the whole vehicle, and the working condition control parameters comprise: the output torque of the first motor, the rotating speed of the second motor, the rotating speed of the third motor, the rotating speed of an input shaft of the gearbox, the oil pressure of a clutch and the gear;
the detecting step comprises:
assembling a clutch to be tested on a detection rack, and setting operation parameters according to the working condition control parameters;
obtaining the difference value between the rotating speed of the first motor and the rotating speed of the input shaft of the gearbox to obtain the sliding friction rotating speed difference N dif ；
Based on the slip speed difference N dif Obtaining a rotary excitationA frequency f;
resampling the torque signal of the clutch according to the rotation excitation frequency to obtain a torque signal sequence T: { T: } 0 ，T 2 ，T 3 ，…，T n Drawing a frequency-torque relation graph according to the relation of the sliding friction rotating speed difference-frequency-torque;
determining the maximum value in a torque signal sequence T based on the frequency-torque relation graph TO obtain a 1-order TO value;
and evaluating the quality of the clutch TO be detected based on the 1 st order TO value.
Further, the output torque of the first motor is set with reference to a vehicle creep torque, which is in a range of 30Nm to 60Nm.
Further, the set value of the output torque of the first motor is 30Nm.
Further, the rotating speed of the first motor is set based on the idle rotating speed of the engine under the vehicle crawling condition, and the idle rotating speed of the engine ranges from 760rpm to 1000rpm.
Further, the rotating speed range of the first motor is 860 rpm-940 rpm.
Further, the rotating speed of the second motor and the rotating speed of the third motor are set based on the rotating speed of an output shaft of a gearbox under the vehicle crawling condition, and the rotating speed range of the output shaft of the gearbox is 144 rpm-157 rpm.
Further, the rotating speed of the input shaft of the gearbox is the product of the rotating speed of the output shaft of the gearbox under the vehicle crawling condition and the total speed ratio of the corresponding gear.
Further, the rotating speed of the input shaft of the gearbox ranges from 480rpm to 520rpm.
Further, the oil pressure range of the clutch is 1.58 bar-1.62 bar.
Further, the clutch gear is 5 th gear.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
according to the method for detecting the sliding friction transmission performance of the wet clutch, the detection rack is arranged, and the structure and the working condition parameters of the detection rack are specifically configured, so that an environment which is closer to the actual working condition is provided for clutch detection, and the reliability of detection is improved; meanwhile, a rotation excitation frequency f is further determined by determining the slip friction rotation speed difference, and a frequency-torque relation graph is drawn by resampling a torque signal of the clutch based on the rotation excitation frequency f; determining the maximum value in a torque signal sequence T based on the frequency-torque relation graph TO obtain a 1-order TO value; therefore, the quality of the clutch TO be detected is evaluated quantitatively based on the 1-order TO value; the efficiency and the reliability of detection are greatly improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a detection bench provided in an embodiment of the present invention;
fig. 2 is provided for an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that all the directional indications in the embodiments of the present application are only used for explaining the relative position relationship, the motion condition, and the like between the components in a certain posture, and if the certain posture is changed, the directional indication is changed correspondingly.
The following disclosure provides many different embodiments, or examples, for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize the application of other processes and/or the use of other materials.
The present application is described below with reference to specific embodiments in conjunction with the attached drawings.
The embodiment of the application provides a method for detecting the sliding friction transmission performance of a wet clutch, and solves the technical problems of poor quality inspection efficiency and poor reliability of a clutch assembly in the prior art.
In order to better understand the technical solutions, the technical solutions will be described in detail below with reference to the drawings and the specific embodiments of the specification, and it should be understood that the embodiments and specific features of the embodiments of the present invention are detailed descriptions of the technical solutions of the present application, and are not limitations of the technical solutions of the present application, and the technical features of the embodiments and examples of the present application may be combined with each other without conflict.
Referring to fig. 1, a wet clutch sliding friction transmission performance detection method, based on a detection bench, performs the following detection steps; namely, the operation detection is carried out by arranging a detection bench and configuring the structure and working condition parameters of the detection bench, so that quantitative operation is carried out based on the monitoring result, and a reliable quality inspection conclusion is obtained based on the settlement result.
It should be noted that the detection bench provided by the embodiment is specifically designed according to the detection condition of the clutch, and then the parameter setting is configured based on the condition.
Specifically, the inspection stage includes: the gearbox, the first motor 1, the second motor 2, the third motor 3 and the torque sensor 4.
The gearbox is provided with a clutch connecting mechanism which is used for being matched and connected with a clutch to be detected; that is, the clutch to be tested is assembled into the transmission for testing by creating a high quality simulated environment.
The gearbox is provided with a gearbox control unit TCU for monitoring the torque of the clutch to be detected and the rotation speed of an input shaft of the gearbox; the gearbox that this embodiment provided is automatic gearbox, can realize the various information acquisition in the work through the communication structure of gas from the area, and is convenient reliable.
The first motor 1 is connected with an input shaft 11 of the gearbox and used for controlling input torque and rotating speed; in this embodiment, the first motor 1 is used to form a detection environment and output a set torque and a set rotation speed.
The torque sensor 4 is connected with the first motor 1 and is used for measuring the input torque and the rotating speed of the first motor 1; it is to be noted that the torque sensor 4 is mainly used for input feedback control to ensure the reliability of the input.
The second motor 2 and the third motor 3 are respectively connected with a first output shaft 12 and a second output shaft 13 of the gearbox and used for controlling the output rotating speed.
It is worth mentioning that the motors are used for stabilizing the control of the rotating speed of the output shaft of the gearbox, and the load torques of the second motor 2 and the third motor 3 can be PWM-regulated according to the oil pressure value of the clutch.
To facilitate operation, the assembly support may be configured to form an environmental platform that serves as a support structure and operating environment for the various equipment components. And independent fixed assembly is carried out on each device through the fixed support. Meanwhile, the three motors can be connected with the input shaft and the output shaft of the gearbox through the motor shaft connecting flange.
In this embodiment, the operating condition control parameters of the wet clutch friction transmission performance detection method are set with reference to the operating condition parameters of the vehicle output, and the operating condition control parameters include: the output torque of the first motor, the rotating speed of the second motor, the rotating speed of the third motor, the rotating speed of the input shaft of the gearbox, the oil pressure of a clutch and the gear.
Specifically, the output torque of the first motor 1 is set with reference to a vehicle creep torque in a range of 30Nm to 60Nm.
Further, the set value of the output torque of the first motor is 30Nm.
On the other hand, the rotation speed of the first electric machine 1 is set based on the idle rotation speed of the engine under the vehicle crawling condition, and the idle rotation speed of the engine ranges from 760rpm to 1000rpm.
Further, the rotating speed range of the first motor is 860 rpm-940 rpm.
In some embodiments, the speed of the second electric machine 2 and the speed of the third electric machine 3 are set based on a transmission output shaft speed in a vehicle creep condition, the transmission output shaft speed ranging from 144rpm to 157rpm. Generally, the creep operating condition output shaft speed is set in terms of the ratio of vehicle speed to (0.377 x rolling radius 0.377).
Similarly, the rotating speed of the input shaft 11 of the gearbox is the product of the rotating speed of the output shaft of the gearbox under the creep working condition of the vehicle and the total speed ratio of the corresponding gear.
The rotating speed range of the input shaft of the gearbox is 480 rpm-520 rpm.
The oil pressure of the clutch 4 is slightly slippery and rubs under the working condition of vehicle crawling, and the oil pressure range of the clutch is 1.58 bar-1.62 bar, which is avoided that 2-axis shimmy influences 1-axis order torque output.
Furthermore, the high gear speed ratio and the output torque are small, the test stability and the recognition rate of the rack are good, and the gear of the clutch is 5.
In general, the measurement time may be set to 2 minutes.
After the clutch to be detected is fitted to the detection stage, performing the detecting step includes:
assembling a clutch to be tested on a detection rack, and setting operation parameters according to the working condition control parameters;
obtaining the difference value between the rotating speed of the first motor and the rotating speed of the input shaft of the gearbox to obtain the sliding friction rotating speed difference N dif ；
Based on the slip speed difference N dif Obtaining a rotation excitation frequency f;
resampling the torque signal of the clutch according to the rotation excitation frequency to obtain a torque signal sequence T: { T 0 ，T 2 ，T 3 ，…，T n Drawing a frequency-torque relation graph according to the relation of the slip friction rotation speed difference-frequency-torque;
determining the maximum value in a torque signal sequence T based on the frequency-torque relation graph TO obtain a 1-order TO value;
and evaluating the quality of the clutch TO be detected based on the TO value of 1 order.
It should be noted that the corresponding relationship of the 1 st order TO value evaluation for the quality of the clutch TO be tested according TO the embodiment may be detected by the above method, and then the detected corresponding relationship is corresponding TO a standard sample after a corresponding detection test is performed, so as TO form an accurate corresponding relationship. Data summarization can be performed through a large number of detections, so that the corresponding relation between the TO value of the 1 st order and the quality inspection score is further optimized. And the quality test rating is determined by the objective product rating of the device.
Relation table of quality inspection score and TO value
| TO value | 1.4 | 0.4 | 0.38 | 0.36 | 0.2 |
| Quality control score | 4 | 5.5 | 6 | 6.5 | 7 |
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
according to the method for detecting the sliding friction transmission performance of the wet clutch, the detection rack is arranged, and the structure and working condition parameters of the detection rack are specifically configured, so that an environment which is closer to the actual working condition is provided for clutch detection, and the detection reliability is improved; meanwhile, a rotation excitation frequency f is further determined by determining the slip friction rotation speed difference, and a frequency-torque relation graph is drawn by resampling a torque signal of the clutch based on the rotation excitation frequency f; determining the maximum value in a torque signal sequence T based on the frequency-torque relation graph TO obtain a 1-order TO value; therefore, the quality of the clutch TO be detected is evaluated quantitatively based on the 1-order TO value; the efficiency and the reliability of detection are greatly improved.
In this application, unless expressly stated or limited otherwise, the terms "connected," "secured," and the like are to be construed broadly, and thus, for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the present application and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated in a particular orientation, and thus are not to be construed as limiting the present application.
In addition, descriptions in this application as to "first", "second", etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.
In the description of the present invention, unless otherwise explicitly specified or limited, the recitation of a first feature "on" or "under" a second feature may include the recitation that the first and second features are in direct contact, and may also include the recitation that the first and second features are not in direct contact, but are in contact via another feature between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (10)
1. A wet clutch sliding friction transmission performance detection method is characterized in that the following detection steps are executed based on a detection rack;
the detection bench includes: the device comprises a gearbox, a first motor, a second motor, a third motor and a torque sensor;
the gearbox is provided with a clutch connecting mechanism used for being connected with a clutch to be detected in an adaptive mode;
the gearbox is provided with a gearbox control unit for monitoring the torque of the clutch to be detected and the rotating speed of an input shaft of the gearbox;
the first motor is connected with an input shaft of the gearbox and used for controlling input torque and rotation speed;
the torque sensor is connected with the first motor and used for measuring the input torque of the first motor;
the second motor and the third motor are respectively connected with a first output shaft and a second output shaft of the gearbox and used for controlling the output rotating speed;
the working condition control parameters of the wet clutch sliding friction transmission performance detection method are set by referring to the working condition parameters output by the whole vehicle, and the working condition control parameters comprise: the output torque of the first motor, the rotating speed of the second motor, the rotating speed of the third motor, the rotating speed of an input shaft of the gearbox, the oil pressure of a clutch and the gear;
the detecting step comprises:
assembling a clutch to be tested on a detection rack, and setting operation parameters according to the working condition control parameters;
obtaining the difference value between the rotating speed of the first motor and the rotating speed of the input shaft of the gearbox to obtain the sliding friction rotating speed difference N dif ；
Based on the slip speed difference N dif Obtaining a rotation excitation frequency f;
resampling the torque signal of the clutch according to the rotation excitation frequency to obtain a torque signal sequence T: { T: } 0 ，T 2 ，T 3 ，…，T n Drawing a frequency-torque relation graph according to the relation of the slip friction rotation speed difference-frequency-torque;
determining the maximum value in a torque signal sequence T based on the frequency-torque relation graph TO obtain a 1-order TO value;
and evaluating the quality of the clutch TO be detected based on the 1 st order TO value.
2. The wet clutch slipping transmission performance detection method as claimed in claim 1, wherein the output torque of the first motor is set with reference to a vehicle creep torque, which is in a range of 30Nm to 60Nm.
3. The method of claim 2, wherein the set value of the output torque of the first electric machine is 30Nm.
4. The method of claim 1, wherein the speed of the first electric machine is set based on an engine idle speed in a creep condition of the vehicle, the engine idle speed ranging from 760rpm to 1000rpm.
5. The method of claim 4, wherein the first electric machine has a speed in a range of 860rpm to 940rpm.
6. The method of claim 1, wherein the rotational speed of the second electric machine and the rotational speed of the third electric machine are set based on a rotational speed of a transmission output shaft under creep conditions of the vehicle, the rotational speed of the transmission output shaft ranging from 144rpm to 157rpm.
7. The method for detecting the slip transmission performance of the wet clutch according to claim 1, wherein the rotation speed of the input shaft of the gearbox is the product of the rotation speed of the output shaft of the gearbox under the creep condition of the vehicle and the total speed ratio of the corresponding gear.
8. The method of claim 7, wherein the input shaft speed of the transmission is in the range of 480rpm to 520rpm.
9. The method of claim 1, wherein the clutch oil pressure is in the range of 1.58bar to 1.62bar.
10. The method of claim 1, wherein the clutch gear is 5 th gear.
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